The First World War changed the pattern of international relations in East Asia. What had previously been another arena for the European power struggle became the cockpit for two regional forces, Japanese expansionism and incipient Chinese nationalism. The confrontation between the two, which was to last for a quarter of a century, began as a most unequal contest. Great power rivalry had enabled China to balance off her enemies and to maintain her status as a sovereign entity. But with Europe distracted, China was helpless, and Japan had a unique opportunity to pursue an independent expansionist policy. Instead of cooperating with England and the other powers in order to get a fair share of the China spoils, after 1914 Japan could make her bid for the grand prize, exclusive access to China's resources. Thus the European powers’ pre-occupation with mutual slaughter exposed China to extreme danger, greater than that which she had faced during the heyday of classical imperialism.1 But Japan was not alone in welcoming the European retreat. Japan’s opportunity was also Sun Yat-sen's opportunity.
